<template>
	<view>
		<!--  自定义的搜索组件-->
		<my-search @click="gotoSearch"></my-search>
	    <view class="scroll-view-container">
	      <!-- 左侧的滚动视图区域 -->
	      <scroll-view class="left-scroll-view" scroll-y :style="{height: wh + 'px'}">
	        <block v-for="(item,i) in cateList" :key="i">
				<view class="left-scroll-view-item" :class="[i === active?'active':'']"
					  @click="handlerClick(i)"	 >{{item.cat_name}}</view>
			</block>
	      </scroll-view>
	      <!-- 右侧的滚动视图区域 -->
	      <scroll-view class="right-scroll-view" scroll-y :style="{height: wh + 'px'}" :scroll-top="scrollTop">
			<view class="cate-lv2" v-for="(item,i) in cateLevel2" :key="i">
				<view class="cate-lv2-title">
					/ {{item.cat_name}} /
					<view class="cate-lv3-list">
						<view class="cate-lv3-item" 
						v-for="(item2,i2) in item.children" :key="i2"
						@click="clickToGoodsList(item2.cat_id)">
							<image :src="item2.cat_icon" mode=""></image>
							<text>{{item2.cat_name}}</text>
						</view>
					</view>
				</view>
			</view>
	      </scroll-view>
	    </view>
	</view>
</template>

<script>
	import badgeMix from "@/mixins/tabbar-badge.js"
	export default {
		data() {
			return {
				cateList:[],
				wh:0,
				active:0,
				cateLevel2:[],
				cateLevel3:[],
				scrollTop:0
			}
		},
		methods: {
			async getCateList(){
				const {data:res} = await uni.$http.get("/api/public/v1/categories")
				console.log(res);
				if(res.meta.status !== 200){
					return uni.showMsg()
				}
				this.replaceHttpsToHttp(res.message)
				this.cateList = res.message
				this.cateLevel2 = res.message[0].children
				this.cateLevel3 = res.message[0].children[0].children
			},
			handlerClick(index){
				this.active = index
				// 重新为二级分类赋值
				this.cateLevel2 = this.cateList[index].children
				// 注意，如果scrollTop切换时的值相同，将不会产生效果。
				// 所以要动态的变化
				this.scrollTop = this.scrollTop ===0 ? 1: 0
			},
			clickToGoodsList(cid){
				uni.navigateTo({
					url:"/subpackage/goods_list/goods_list?cid=" + (cid)
				})
			},
			gotoSearch(){
				// console.log("fuck you");
				uni.navigateTo({
					url:"/subpackage/search/search"
				})
			},
			replaceHttpsToHttp(obj) {
				if (typeof obj === 'object' && obj !== null) {
					if (Array.isArray(obj)) {
						obj.forEach(item => this.replaceHttpsToHttp(item));
					} else {
						Object.keys(obj).forEach(key => {
							if (key === 'cat_icon' && typeof obj[key] === 'string') {
								// 替换操作
								obj[key] = obj[key].replace(/^https:\/\//i, 'http://');
							} else {
								this.replaceHttpsToHttp(obj[key]);
							}
						});
					}
				}
			}
		},
		onLoad(){
			const systemInfo = uni.getSystemInfoSync()
			this.wh = systemInfo.windowHeight - 50
			this.getCateList()
		},
		mixins:[badgeMix]
	}
</script>

<style lang="scss" scoped>
.scroll-view-container {
  display: flex;

  .left-scroll-view {
    width: 120px;

    .left-scroll-view-item {
      line-height: 60px;
      background-color: #f7f7f7;
      text-align: center;
      font-size: 12px;

      // 激活项的样式
      &.active {
        background-color: #ffffff;
        position: relative;

        // 渲染激活项左侧的红色指示边线
        &::before {
          content: ' ';
          display: block;
          width: 3px;
          height: 30px;
          background-color: #c00000;
          position: absolute;
          left: 0;
          top: 50%;
          transform: translateY(-50%);
        }
      }
    }
  }
}
.cate-lv2-title {
  font-size: 12px;
  font-weight: bold;
  text-align: center;
  padding: 15px 0;
}

.cate-lv3-list{
	display: flex;
	flex-wrap: wrap;
	.cate-lv3-item{
		width: 33.3%;
		display: flex;
		flex-direction: column;
		align-items: center;
		margin-bottom: 10px;
		image{
			height: 60px;
			width: 60px;
		}
		text{
			font-size: 12px;
		}
	}
}
</style>
